Perhaps you should try some spelling variations:
"trinh cau phap snippets" » "trinh chat phap snippets", "trinh chao phap snippets", "trinh tu phap snippets", "trinh cu phap snippets", "trinh cau chap snippets", "trinh cau pham snippets", "trinh cau phap slippers"
"dung dung code snippets" » "duong dung code snippets", "ung dung code snippets", "dung ung code snippets", "dung dung cong snippets", "dung dung co snippets", "dung dung de snippets", "dung dung code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("trinh cau phap snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))~.
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